Flight Changi Airport departs from Singapore Changi Airport at 02:00 and arrives at Manila Ninoy Aquino International Airport at 05:40.
The flighttime is about 3h 40m. The distance travelled ("as the bird flies"): 1963 Km. So the average speed is roughly 535 Km.
The best day to arrive at Singapore is Saturday and it would be best to avoid Tuesday, as prices are on average 322.48% higher than on Saturday. (Average prices, based on 8809374 datapoints.)
We have a lot more statistics for flights SQ 8636 and between Singapore and Manila.